Bathtub



FIG. 1, is a top plan view of a bath tub showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right end elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left end elevational view thereof;

FIG. 6 is a bottom plan view thereof; and

FIG. 7 is a perspective view taken from the top, front and left end thereof. 

The ornamental design for a bath tub, as shown and described. 